Corrected sentences
Our heart is a strong muscle about the size of our fist. It pumps blood through twisty tubes called blood vessels. This keeps us alive.
What I changed and why (easy steps)
- Changed 'and sends it' to 'pumps blood through' so the sentence is shorter and sounds smoother.
- Changed 'We stay alive' to 'This keeps us alive' so it clearly tells what the heart does.
- Kept each idea as its own short sentence: short sentences are easier to read and understand.
Simple grammar tips
- Start a sentence with a capital letter and end with a period.
- Make sure you have a subject (who or what) and a verb (action). Example: The heart (subject) pumps (verb) blood (what it pumps).
- Use short sentences to explain one idea at a time.
Nice work! Your original idea was great — just a few small changes made it clearer.